More Bubbles, Less Plastic!  Aarke cylinders follow the current market standard. Their gas cylinder is the standard 60L size to accommodate most sparkling water and soda water machines on the market. It contains 425g of food grade carbon dioxide, providing approximately 60 liters of carbonated water depending on your carbonation preferences.  Return your cylinder to our shop on Hillside Road, Greystones and get €8 off your next cylinder!  Aarke exchange cylinders pass through a thorough re-inspection for guaranteeing continuous quality of the cylinders before getting re-filled with natural food grade CO2. Aarke cylinders and valves undergo intense testing and hold the following certificates: TÜV, BAM, DIN EN ISO 7866. Store your Aarke CO2 cylinders in a cool, dry environment. Avoid storing in direct sunlight or close to other heat sources.